Posted On: Sep 01, 2020
It is used as a reference on a part if the reference doesn't exist already. In the absence of an appropriate planar surface, it is possible to sketch or place a feature on a datum plane. If it were an edge you can dimension to a datum place. You can also utilize a datum plane while constructing an assembly.
Although the size of the Datum plane is infinite, it is really easy to resize them to fit part, feature, axis, surface, edge or the measurement of the display outline of the datum plane
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